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toxinexx
e7219e4bc4
The library registered no shutdown callback, so a guest mixer thread kept calling sceAudioOut2ContextPush while exit ran the static destructors and mixed from the freed port table (#5864). Exports that read the port tables or output audio now hold a guard: once exit starts they park the thread with LibcAwaitExit_nid_postfix, and the shutdown callback waits for the calls already inside. A push waiting for a grain from sceAudioOut2ContextAdvance also wakes on the shutdown token, so the callback does not wait for an advance that is parked.
35 lines
768 B
C++
35 lines
768 B
C++
#include <atomic>
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#include <cstdint>
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#include "prx/libc/include/Shutdown.hpp"
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#include "AudioOutShutdown.hpp"
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namespace {
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std::atomic<std::uint32_t> inside{0};
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std::atomic<bool> stopping{false};
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void Leave() {
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if (inside.fetch_sub(1) == 1) inside.notify_all();
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}
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void Stop() {
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stopping.store(true);
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for (auto count = inside.load(); count != 0; count = inside.load()) inside.wait(count);
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}
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}
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AudioOutCall::AudioOutCall() {
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static const bool registered = (LibcRegisterShutdown_nid_postfix(Stop), true);
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static_cast<void>(registered);
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inside.fetch_add(1);
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if (stopping.load() || LibcShutdownToken_nid_postfix().stop_requested()) {
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Leave();
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throw ProcessShutdown{};
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}
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}
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AudioOutCall::~AudioOutCall() {
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Leave();
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}
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